Sec. 21.255.  COMMISSION'S INTERVENTION IN CIVIL ACTION BY COMPLAINANT.  After receipt of a timely application, a court may permit the commission to intervene in a civil action filed under Section 21.254 if:
(1)  the commission certifies that the case is of general public importance;  and
(2)  before commencement of the action the commission issued a determination of reasonable cause to believe that this chapter was violated.
Acts 1993, 73rd Leg., ch. 269, Sec. 1, eff. Sept. 1, 1993.